• 제목/요약/키워드: Difficult-to-cut marerial

검색결과 1건 처리시간 0.019초

경화처리된 합금공구강의 절삭에서 가공 표면층의 표면성상에 관한 연구 (A study on the surface integrity of machined surface layer in machining hardened STD11 steel)

  • 노상래;안상욱
    • 한국정밀공학회지
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    • 제11권5호
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    • pp.153-160
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    • 1994
  • In this study, residual stress and surface roughness were investigated experimentally to evaluate surface integrity on surface layer machined by CBN, ceramics and WC cutting tools. When machining difficult-to-cut material (hardened STD11 steel $H_{R}$C 60), residual stresses remaining in machined surface layer were mainly compressive. The increase of flank wear caused a shift of the compressive residual stress maximum to greater workpiece depths, but the changes did not penetrate the workpiece beneath a depth of 300 .mu. m. Surface roughness was influenced considerably by variations of the cutting speed and feed. In machining hard material, CBN and A1$_{2}$ $O_{3}$ ceramics cutting tool materials proved significantly superior to mixed ceramics A1$_{2}$ $O_{3}$-TiC and WC in evaluation of surface integrity.y.

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